Since the logistics of the Demon King Castle are basically handled by skeleton soldiers, after Bone Frame left, these skeleton soldiers were leaderless for a while, causing the Demon King Castle to come to a standstill until Shami reissued orders, restoring normalcy.
In those two days without Bone Frame around, Shami noticed a bit of inconvenience while working.
When the Demon King Castle was first built, there was a need for manpower in many areas. The four Demon Envoys were in school, so Shami found Bone Frame, the idlest among the demons, to take on the role of the castle's butler.
But later, due to a series of inexplicable events, Bone Frame became a maid, a bed warmer.
Also, frequently staying by Shami's side to convey the Demon King's orders to the Demon Realm, Bone Frame naturally became the Demon King's personal assistant.
Fast forward to the present, although Bone Frame usually wears a maid's outfit, she is more like the real ruling butler of the Demon King Castle.
